This is a pair of shoes

一双───a pair

a pair of bloomers───一条短灯笼裤

Maximo put on a pair of glasses.───马克西莫戴上了一副眼镜。

Eventually they reached a pair of ornately carved doors.───他们最终来到一扇雕刻精美的对开门前。

a pair of black leather boots───一双黑皮靴

She picked up a pair of scissors from the windowsill.───她从窗台上拿起一把剪刀。

She clamped a pair of headphones over her ears.───她把一副耳机戴在两边耳朵上。

He also wore a pair of bracrs.───他也穿着吊带裤。

She fished out a pair of David's socks for her cold feet.───她找出一双戴维的袜子穿在了冰冷的脚上。

He put on a pair of short pants and an undershirt.───他穿上了一条短裤和一件汗衫。

a pair of breeches───一条半长裤

Every couple is not a pair. 

Mother bought her a pair of tennis shoes.

She has lost a pair of stockings.

I've got a pair of aces.

He wore a pair of black trousers.

Always my a pair comity is constant.

She bought a pair of woollen hose yesterday.

It is not every couple that is a pair. 

Draw a pair of parallel lines.